Public bug reported:

VPN is completely busted on bionic-desktop (4/21/2018).  In 17.10 my VPN
was still working, "only" had to do a `killall nm-applet; nohup nm-
applet &` to get the password prompt to show up.  In bionic, at least
that portion now works without work-around.  However, I can't establish
my VPN to my workplace at all.

My VPN configuration in /etc/NetworkManager/system-connections/Test
seems rather basic:

[connection]
id=Test
uuid=ae916f15-2e8d-46b0-92d3-c2dece212c40
type=vpn
autoconnect=false
permissions=user:thomas:;

[vpn]
domain=XXXXXX.XXX
gateway=vpn.XXXXXX.XXX
password-flags=2
refuse-chap=yes
refuse-eap=yes
refuse-pap=yes
require-mppe=yes
user=YYYYYYYYY
service-type=org.freedesktop.NetworkManager.pptp

[ipv4]
dns=10.11.11.11;
dns-search=
method=auto
never-default=true
route1=10.11.0.0/16,10.11.31.31

[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=ignore

Here's the logs from syslog:

Apr 22 10:29:18 thomas-bionic NetworkManager[507]: <info>  [1524414558.0300] 
audit: op="connection-activate" uuid="ae916f15-2e8d-46b0-92d3-c2dece212c40" 
name="Test" pid=1141 uid=1000 result="success"
Apr 22 10:29:18 thomas-bionic gnome-shell[781]: JS ERROR: TypeError: item is 
undefined#012setActiveConnections/<@resource:///org/gnome/shell/ui/status/network.js:1518:17#012setActiveConnections@resource:///org/gnome/shell/ui/status/network.js:1515:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_syncVpnConnections@resource:///org/gnome/shell/ui/status/network.js:1853:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
Apr 22 10:29:18 thomas-bionic NetworkManager[507]: <info>  [1524414558.0445] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
Started the VPN service, PID 2601
Apr 22 10:29:18 thomas-bionic NetworkManager[507]: <info>  [1524414558.0631] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
Saw the service appear; activating connection
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.2896] 
settings-connection[0x55588511f440,ae916f15-2e8d-46b0-92d3-c2dece212c40]: 
write: successfully updated (keyfile: update 
/etc/NetworkManager/system-connections/Test 
(ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test")), connection was modified in the 
process
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.3008] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
VPN connection: (ConnectInteractive) reply received
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.3095] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
VPN plugin: state changed: starting (3)
Apr 22 10:29:21 thomas-bionic pppd[2613]: Plugin 
/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: Plugin 
/usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
Apr 22 10:29:21 thomas-bionic pppd[2613]: pppd 2.4.7 started by root, uid 0
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.3358] 
manager: (ppp0): new Ppp device (/org/freedesktop/NetworkManager/Devices/5)
Apr 22 10:29:21 thomas-bionic pppd[2613]: Using interface ppp0
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: Using interface ppp0
Apr 22 10:29:21 thomas-bionic pppd[2613]: Connect: ppp0 <--> /dev/pts/0
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: Connect: ppp0 <--> /dev/pts/0
Apr 22 10:29:21 thomas-bionic pptp[2620]: nm-pptp-service-2601 
log[main:pptp.c:353]: The synchronous pptp option is NOT activated
Apr 22 10:29:21 thomas-bionic systemd-udevd[2617]: link_config: autonegotiation 
is unset or enabled, the speed and duplex are not writable.
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.3610] 
devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 22 10:29:21 thomas-bionic NetworkManager[507]: <info>  [1524414561.3613] 
device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown 
configuration found.
Apr 22 10:29:21 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 1 
'Start-Control-Connection-Request'
Apr 22 10:29:21 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_disp:pptp_ctrl.c:781]: Received Start Control Connection Reply
Apr 22 10:29:21 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_disp:pptp_ctrl.c:815]: Client connection established.
Apr 22 10:29:22 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 7 
'Outgoing-Call-Request'
Apr 22 10:29:22 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_disp:pptp_ctrl.c:900]: Received Outgoing Call Reply.
Apr 22 10:29:22 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_disp:pptp_ctrl.c:939]: Outgoing call established (call ID 63889, 
peer's call ID 52566).
Apr 22 10:29:52 thomas-bionic pppd[2613]: LCP: timeout sending Config-Requests
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: LCP: timeout sending 
Config-Requests
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: Connection terminated.
Apr 22 10:29:52 thomas-bionic pppd[2613]: Connection terminated.
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: <warn>  [1524414592.3891] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
VPN plugin: failed: connect-failed (1)
Apr 22 10:29:52 thomas-bionic gnome-shell[781]: Removing a network device that 
was not added
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: <info>  [1524414592.4202] 
vpn-connection[0x555885252640,ae916f15-2e8d-46b0-92d3-c2dece212c40,"Test",0]: 
VPN service disappeared
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: <info>  [1524414592.4244] 
devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 22 10:29:52 thomas-bionic pppd[2613]: Terminating on signal 15
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: Terminating on signal 15
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: Child process /usr/sbin/pptp 
XXX.XXX.XXX.XXX --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-2601 
(pid 2616) terminated with signal 15
Apr 22 10:29:52 thomas-bionic NetworkManager[507]: Modem hangup
Apr 22 10:29:52 thomas-bionic pppd[2613]: Child process /usr/sbin/pptp 
XXX.XXX.XXX.XXX --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-2601 
(pid 2616) terminated with signal 15
Apr 22 10:29:52 thomas-bionic pppd[2613]: Modem hangup
Apr 22 10:29:52 thomas-bionic pppd[2613]: Exit.
Apr 22 10:29:52 thomas-bionic pptp[2620]: nm-pptp-service-2601 
warn[decaps_hdlc:pptp_gre.c:226]: short read (-1): Input/output error
Apr 22 10:29:52 thomas-bionic pptp[2620]: nm-pptp-service-2601 
warn[decaps_hdlc:pptp_gre.c:238]: pppd may have shutdown, see pppd log
Apr 22 10:29:52 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[callmgr_main:pptp_callmgr.c:245]: Closing connection (unhandled)
Apr 22 10:29:52 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 12 
'Call-Clear-Request'
Apr 22 10:29:52 thomas-bionic pptp[2632]: nm-pptp-service-2601 
log[call_callback:pptp_callmgr.c:84]: Closing connection (call state)
Apr 22 10:29:52 thomas-bionic gnome-shell[1141]: Removing a network device that 
was not added

** Affects: network-manager-pptp (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1766103

Title:
  bionic: VPN not working at all

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